Fears of a second bomb after Derry blast
An explosion rocked Londonderry late last night and police were examining a second device.
Shortly after 11pm, a device - possibly a pipe bomb or blast bomb - exploded in Crawford Square near the Probation Service's office.
The PSNI was setting up a security cordon around the scene when a report emerged of a car burning nearby.
Northland Road was sealed off and the Fire and Rescue Service joined a heavy security presence.
A second suspicious device was found later, and householders were forced to leave their homes.
The security alert happened very close to De Burgh Square, where a young man died in a fire yesterday.
There is no suggestion that the two incidents were related.
A spokesperson for the PSNI wrote on Twitter: "Police at scene of security alert at Crawford Sq in Derry following explosion.
"Residents evacuated as further suspect object examined."
Crawford Square remains closed to traffic this morning.